Home page logo

fulldisclosure logo Full Disclosure mailing list archives

Re: Facebook Attach EXE Vulnerability
From: "Mikhail A. Utin" <mutin () commonwealthcare org>
Date: Tue, 1 Nov 2011 09:03:17 -0400

Face Book is trying to save its face. It's typical.
I got the same answer from SonicWALL one year ago when discovered that simple internal network scanning (Nessus, Nmap, 
etc.) brings down entire network. The firewall internal TCP connections stack was overloaded within a few seconds (IPS 
is not enabled, thus was not accepting new connections.

Mikhail A. Utin, CISSP
Information Security Analyst

-----Original Message-----
From: full-disclosure-bounces () lists grok org uk [mailto:full-disclosure-bounces () lists grok org uk] On Behalf Of 
full-disclosure-request () lists grok org uk
Sent: Tuesday, November 01, 2011 8:00 AM
To: full-disclosure () lists grok org uk
Subject: Full-Disclosure Digest, Vol 81, Issue 1

Send Full-Disclosure mailing list submissions to
        full-disclosure () lists grok org uk

To subscribe or unsubscribe via the World Wide Web, visit
or, via email, send a message with subject or body 'help' to
        full-disclosure-request () lists grok org uk

You can reach the person managing the list at
        full-disclosure-owner () lists grok org uk

When replying, please edit your Subject line so it is more specific than "Re: Contents of Full-Disclosure digest..."

Note to digest recipients - when replying to digest posts, please trim your post appropriately. Thank you.

Today's Topics:

   1. Re: Facebook Attach EXE Vulnerability (Charles Morris)

Message: 1
Date: Mon, 31 Oct 2011 10:40:24 -0400
From: Charles Morris <cmorris () cs odu edu>
Subject: Re: [Full-disclosure] Facebook Attach EXE Vulnerability
To: Nathan Power <np () securitypentest com>
Cc: Full Disclosure <full-disclosure () lists grok org uk>
        <CABgawuYGTu1=eG2NEsD9g_n_aaPWE1myQzrZNc0TDZ5sqsb2VQ () mail gmail com>
Content-Type: text/plain; charset=ISO-8859-1

Nathan, It IS an issue, don't let their foolishness harsh your mellow.

Although it's a completely ridiculous, backwards, and standards-relaxing "security" mechanism, the fact is they 
implemented it, and you subverted it.

In my book that's Pentester 1 :: Fail Vendor 0

I've had large vendors (read:Microsoft) reply to issues with the same kind of garbage, where they take a situation 
where there wasn't a threat, create a "security" mechanism to counter the nonexistent threat, then implement it 
incorrectly, thus creating either a vulnerability in the system itself or a false sense of security for the user.

Fail: "Hello user, you can add attachments now! Look at our amazing
1997 web technology!!"

User: "Oh neat, I can't wait to send my friend this random file (read:
give up your rights and control of your random file to facebook) your through your excessive, unnecessary, inefficient, 
insecure, closed-source tool"

Fail: "I am blocking exe attachments 'for your security' so feel free to just run attachments without a second thought, 
don't even bother to waste 100ns of your time to practice normal security"

User: "Wait, what about .bat, .cmd, .vbs, .ws, .pif, .inx, .lnk etc etc? What about the extensions that I set up? Can I 
really just spam clicks all over the place?"

Fail: "Oh those, well you shouldn't be clicking those. What, we can't be held responsible if you don't practice normal 
security!! P.S. You know when we said we were blocking .exe files? Well--- we aren't.


On Fri, Oct 28, 2011 at 1:38 PM, Nathan Power <np () securitypentest com> wrote:
I was?basically?told that Facebook didn't see it as an issue and I was 
puzzled by that. Ends up the Facebook security team had issues 
reproducing my work and?that's?why they?initially?disgarded it. After 
publishing, the Facebook security team re-examined the issue and by 
working with me they seem to have been able to reproduce the bug.

CONFIDENTIALITY NOTICE: This email communication and any attachments may contain confidential 
and privileged information for the use of the designated recipients named above. If you are 
not the intended recipient, you are hereby notified that you have received this communication 
in error and that any review, disclosure, dissemination, distribution or copying of it or its 
contents is prohibited. If you have received this communication in error, please reply to the 
sender immediately or by telephone at (617) 426-0600 and destroy all copies of this communication 
and any attachments. For further information regarding Commonwealth Care Alliance's privacy policy, 
please visit our Internet web site at http://www.commonwealthcare.org.

Full-Disclosure - We believe in it.
Charter: http://lists.grok.org.uk/full-disclosure-charter.html
Hosted and sponsored by Secunia - http://secunia.com/

  By Date           By Thread  

Current thread:
[ Nmap | Sec Tools | Mailing Lists | Site News | About/Contact | Advertising | Privacy ]